Question

plz help........... ?????

Answer 1

Answer:

12 cm

Step-by-step explanation:

Given, radius and the slant height are in the ratio 4 : 7.

Let radius = 5x, Slant height = 7x.

∴ Curved surface area of the cone = πrl.

⇒ πrl = 792

⇒ (22/7) * (4x) * (7x) = 792

⇒ 22 * 4x² = 792

⇒ 88x² = 792

⇒ x² = 792/88

⇒ x² = 9

⇒ x = 3

Then:

⇒ 4x

⇒ 4 * 3

⇒ 12 cm.

Therefore:

Radius of the cone = 12 cm.

Hope it helps!

Answer 2

Answer:

12

Step-by-step explanation:

let the radius of the cone be r=4x and its slant height be l= 7x

the curved surface area is 792 cm square.

therefore its radius =4x=4*3=12 cm